Method for Predicting Rock Drillability Grade Values ​​in Different Drilling Directions in Shale Formation

A shale and stratum technology, which is applied in the field of predicting rock drillability grades in different drilling directions of shale strata, can solve the problems that the experimental evaluation method of rock drillability has not been proposed, and can save the cost of coring and reduce the cost of coring. Reduce the effect of repetitive work

Active Publication Date: 2016-04-06
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rise of shale gas, the experimental evaluation method for the rock drillability of shale formations has not yet been proposed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for Predicting Rock Drillability Grade Values ​​in Different Drilling Directions in Shale Formation
  • Method for Predicting Rock Drillability Grade Values ​​in Different Drilling Directions in Shale Formation
  • Method for Predicting Rock Drillability Grade Values ​​in Different Drilling Directions in Shale Formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Such as figure 1 As shown, the method for predicting the rock drillability level value of different drilling directions in shale formations includes the following steps:

[0018] Step 1. Determine the drillability level of shale samples in different drilling directions. The specific method is as follows:

[0019] 1) Use a coring machine to take out cores with a diameter of 76.2 mm and a length of 50 mm in different bedding directions from the entire shale sample, and use a lathe to flatten the two end faces of the core. If it exceeds 0.2mm, put the core into the oven and bake at 100°C for 24 hours;

[0020] 2) Put the treated cores with different bedding directions into the rock drillability measurement system in sequence, and measure the drillability grade values ​​of the cores with different bedding directions respectively;

[0021] Drilling direction, which is the axial direction of the shale sample, is the same as figure 2 The angles shown are in the same relati...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for predicting drillability grade values of rock in different drilling directions of a shale stratum. The method includes the following steps: drillability grade values and interval transit time of a shale sample in different drilling directions are measured; a relation model among the drillability grade values, the interval transit time and drilling angles is established; a relation model among the interval transit time in the different drilling directions of the shale sample and interval transit time and a drilling angle in the perpendicular bedding plane direction is established; a relation model among the drillability grade values of the shale sample in the different drilling directions and the interval transit time and the drilling angle in the perpendicular bedding plane direction is established; logging information is obtained, and the interval transit time in the perpendicular bedding plane direction is obtained through inversion; according to the relation model among the drillability grade values in the different drilling directions of the shale stratum and the interval transit time and the drilling angle in the perpendicular bedding plane direction, drillability grade values in different drilling directions of a shale stratum on site are determined. According to the method, the acoustic logging information can be used for directly predicting the drillability grade values of the rock in the different directions of the shale stratum.

Description

technical field [0001] The invention belongs to the technical field of underground resource drilling engineering, and in particular relates to a method for predicting rock drillability levels in different drilling directions of shale formations. Background technique [0002] The drillability of rock can be used as an important basis for bit selection and geological stratification guidance in the exploration and development of oil and gas fields. Since the middle of the last century, scholars at home and abroad have devoted themselves to the study of rock drillability, and the determination of the drillability level of formation rocks through indoor core experiments has been widely adopted by the petroleum industry. Accurately predicting rock drillability is of great significance to improving deep well ROP, shortening drilling cycle and improving deep well drilling level. With the rise of shale gas, no experimental evaluation method for the rock drillability of rational form...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 张辉高德利苗侠
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap